Thermal-efficiency casing for heating boilers



Jan. 18, 1927.

C. A. RYERSON THERMAL EFFICIENCY CASING FOR HEATING BOILERS Filed March29, 1924 IIIVEIiiTElR E.A.HYEH5UN 6! AT Y5.

Patented Jan. 18, 1927.

CORNELIUSARTHUR RYERSON, OF TORONTO, ONTARIO, CANADA.

THERMAL-EFFICIENCY CASING. .FOR HEATING BOILERS.

Application filed March- 29, 1924.

My invention relates to improvements in thermal efficiency casings forheating boilers and the object of the invention is to devise an improvedmeans for directing the hot gases issuing from the furnace down aroundtheoutside of the water jacket prior to their issuing to the smoke pipe.

A further object is to devise alternative means whereby the hot gasesissuing from the furnace can be led directly to the smoke pipe withouttraversing the outer surface of the water jacket.

A still further object is to devise means whereby the means forconducting the exhaust gases about the outer surface of the water jacketcan be adjusted when the easing has been placed in position tocompensate for the draught of the particularchimney to which the deviceis applied.

My invention consists of a casing'constructed and arranged all ashereinafter more particularly described and illustrated in theaccompanying drawing in which:

Fig. 1 represents a side elevation of my casing broken away to disclosethe construction thereof in section.

Fig. 2 is a front elevation thereof partly in section, and

Fig. 3 is a plan view partly in section.

Like characters of reference indicate corresponding parts in thedifferent views.

The present embodiment of my invention is particularly applicable tovertical sectional boilers in which 1 represents the vertical sectionsof the water jacket and 2 is the outlet pipe for the gases from thefirepot. 3 is a rectangular casing of suitable heating insulatingmaterial extending around the furnace and its side and rear walls spacedtherefrom. 4 is a horizontal partition in the casing positionedimmediately above the top of the furnace, the rear end ofsuch horizontalpartition l being provided with a downwardly extending baffle 5 throughwhich extends the slide damper 6 adapted to be operated by the rod 7extending exteriorly of the casing. 8 are orifices provided through thepartition 4 in the vicinity of its sides into which are inserted thetelescopic tubes 9, the upper portions of said tubes having the flanges10 which engage the top surface of the partition and thus hold the tubesin their suspended position. The lower portions of the tubes are adaptedto telescope into the upper portions Serial No. 703905.

and are held in their adjusted position by frictional contact therewith.ll'is an outlet orifice in the casing adapted to be connected with thesmoke pipe'12. 13 are a. plurality of clean-out orifices extendingthrough the top of the casing; preferably in registerwith the tubes 9,-said orifices-belng closed by the tampions 14, and 15 are a plurality ofsimilar orifices provided in the sides of the casing 3 in the vicinityof the lower ends of the tubes in order that the lower portions of thesaid tubes can be readily adjusted when desired, said orifices beingclosed by the tampions 16.

hen my casing is assembledthe tampions 16 are removed and the lowerportions of the tubes 9 are adjusted so thatthe hot gases constitutingthe products of combustion are evenly distributed over the-entire outersurface of the sectional of 'the'h'ot water jacket. W hen this is donethe lower edges of the forward tubes are positioned above the loweredges of the intermediate tubes and, likewise the lower edges of theintermediate tubes are positioned above the lower edges of the rearmosttubes. This is explained by reason of the fact that the longer the pullto the smoke pipe the shorter will be the length of the tube 9 in orderto constitute an even pull on the hot gases from such casing.

The operation of my device is as follows:

lVhen the slide damper 6 is closed the hot gases issuing from the outlet2 are deflected downwardly by the baffle 5 and pass forwardly asindicated by the arrows in Figure 1 of the drawing. As their densityincreases, further gas being introduced into the casing passes down theoutside of the sections 1 until it reaches the lower ed es of the tubes9 when it is drawn upwardly therethrough into the upper portion of thecasing above the partition at and thence rearwardly out of the outlet 11into the smoke pipe 12. Consequently such gases heat the exteriorsurfaces of the sections 1 prior to issuing from the casing.

Tn starting the fire in the furnace or where it is desired to reduce thetemperature of the water in the sections, the damper 6 is opened and thehot gases issuing from the outlet 2 will then pass directly through thebafile 5 into the outlet orifice 11 and thence to the smoke pipe withoutpassing around the outer surface of the sections 1.

From the above description it will be apparent that I have devised asimple and effective casing for heating boilers that will materiallyincrease the efficiency of such furnace and, moreover, one in which theheating of the water therein can be readily varied irrespective of thefire in such furnace.

lVhile I have shown my casing as applied to vertical sectional boilersknown as the square sectional type, it could with equal facility beapplied to any other type such as the vertical round section type.

What I claim as my invention is:

l. The combination with a hot water boiler and a smoke pipe, of a casingsurrounding the boiler and spaced apart from the walls and top thereof,a plurality of depending telescopic tubes in said casing, the hot gasesfrom the furnace being admitted into the casing, means for conductingthe gases from such casing to the smoke pipe through the tubes, andalternative means for conducting the gases from the furnace directly tothe smoke pipe.

2. The combination with a hot water boiler and a smoke pipe, of a casingsur-- and dividing it into upper and lower chanibers, the smoke pipecommunicating with the upper chamber, said partition having an outletorifice therethrough, a damper for such orifice and said partitionhaving a plurality of orifices in the vicinity of each side thereof,telescopic tubes depending from each side orifices into the lowerchamber of the casing between the walls of the boiler and the side wallsof the casing.

3. The combination with a hot water boiler and a smoke pipe, of a casingsurrounding the boiler, a partition extending across the casing in thevicinity of its top and dividing it into upper and lower chainers, thesmoke pipe communicating with the upper chamber, said partition havingan outlet orifice therethrough, a damper for such orifice and saidpartition having a plurality of orifices in the vicinity of each sidethereof, telescopic tubes depending from each side orifices into thelower chamber of the casing between the walls of the boiler. and theside walls of the casing, the side walls and top of the casing havingorifices tlierethrough in the vicinity of the lower ends and tops of thesaid tubes respectively and closures for such orifices.

CORNELIUS ARTHUR RYERSON.

